<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Class template sum</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../../../index.html" title="Chapter 1. Boost.Histogram">
<link rel="up" href="../../../histogram/reference.html#header.boost.histogram.accumulators.sum_hpp" title="Header &lt;boost/histogram/accumulators/sum.hpp&gt;">
<link rel="prev" href="mean.html" title="Class template mean">
<link rel="next" href="is_thread_safe_th_idm13325.html" title="Struct template is_thread_safe&lt;thread_safe&lt; T &gt;&gt;">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
<td align="center"><a href="../../../../../../../index.html">Home</a></td>
<td align="center"><a href="../../../../../../libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="mean.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../histogram/reference.html#header.boost.histogram.accumulators.sum_hpp"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="is_thread_safe_th_idm13325.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="refentry">
<a name="boost.histogram.accumulators.sum"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Class template sum</span></h2>
<p>boost::histogram::accumulators::sum — Uses Neumaier algorithm to compute accurate sums of floats. </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../histogram/reference.html#header.boost.histogram.accumulators.sum_hpp" title="Header &lt;boost/histogram/accumulators/sum.hpp&gt;">boost/histogram/accumulators/sum.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ValueType<span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">ValueType</span>          <a name="boost.histogram.accumulators.sum.value_type"></a><span class="identifier">value_type</span><span class="special">;</span>     
  <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&amp;</span> <a name="boost.histogram.accumulators.sum.const_reference"></a><span class="identifier">const_reference</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="sum.html#boost.histogram.accumulators.sumconstruct-copy-destruct">construct/copy/destruct</a></span>
  <a class="link" href="sum.html#idm13303-bb"><span class="identifier">sum</span></a><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span>
  <a class="link" href="sum.html#idm13304-bb"><span class="identifier">sum</span></a><span class="special">(</span><span class="identifier">const_reference</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="sum.html#idm13308-bb"><span class="identifier">sum</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <a class="link" href="sum.html#idm13315-bb"><span class="identifier">sum</span></a><span class="special">(</span><span class="identifier">const_reference</span><span class="special">,</span> <span class="identifier">const_reference</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="sum.html#idm13200-bb">public member functions</a></span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a class="link" href="sum.html#idm13201-bb"><span class="keyword">operator</span><span class="special">++</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a class="link" href="sum.html#idm13205-bb"><span class="keyword">operator</span><span class="special">+=</span></a><span class="special">(</span><span class="identifier">const_reference</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a class="link" href="sum.html#idm13211-bb"><span class="keyword">operator</span><span class="special">+=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a class="link" href="sum.html#idm13218-bb"><span class="keyword">operator</span> <span class="special">*=</span></a><span class="special">(</span><span class="identifier">const_reference</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">bool</span> <a class="link" href="sum.html#idm13224-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">bool</span> <a class="link" href="sum.html#idm13229-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="identifier">value_type</span> <a class="link" href="sum.html#idm13234-bb"><span class="identifier">value</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="identifier">const_reference</span> <a class="link" href="sum.html#idm13237-bb"><span class="identifier">large_part</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="identifier">const_reference</span> <a class="link" href="sum.html#idm13240-bb"><span class="identifier">small_part</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">explicit</span> <a class="link" href="sum.html#idm13243-bb"><span class="keyword">operator</span> <span class="identifier">value_type</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Archive<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="sum.html#idm13245-bb"><span class="identifier">serialize</span></a><span class="special">(</span><span class="identifier">Archive</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">unsigned</span><span class="special">)</span><span class="special">;</span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a class="link" href="sum.html#idm13253-bb"><span class="keyword">operator</span> <span class="special">*=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <a class="link" href="sum.html#idm13259-bb"><span class="keyword">operator</span> <span class="special">*</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a class="link" href="sum.html#idm13265-bb"><span class="keyword">operator</span><span class="special">/=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <a class="link" href="sum.html" title="Class template sum">sum</a> <a class="link" href="sum.html#idm13271-bb"><span class="keyword">operator</span><span class="special">/</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">bool</span> <a class="link" href="sum.html#idm13277-bb"><span class="keyword">operator</span><span class="special">&lt;</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">bool</span> <a class="link" href="sum.html#idm13282-bb"><span class="keyword">operator</span><span class="special">&gt;</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">bool</span> <a class="link" href="sum.html#idm13287-bb"><span class="keyword">operator</span><span class="special">&lt;=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="keyword">bool</span> <a class="link" href="sum.html#idm13292-bb"><span class="keyword">operator</span><span class="special">&gt;=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="identifier">const_reference</span> <a class="link" href="sum.html#idm13297-bb"><span class="identifier">large</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="identifier">const_reference</span> <a class="link" href="sum.html#idm13300-bb"><span class="identifier">small</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm20700"></a><h2>Description</h2>
<p>The algorithm is an improved Kahan algorithm (<a href="https://en.wikipedia.org/wiki/Kahan_summation_algorithm" target="_top">https://en.wikipedia.org/wiki/Kahan_summation_algorithm</a>). The algorithm uses memory for two numbers and is three to five times slower compared to using a single number to accumulate a sum, but the relative error of the sum is at the level of the machine precision, independent of the number of samples.</p>
<p>A. Neumaier, Zeitschrift fuer Angewandte Mathematik und Mechanik 54 (1974) 39-51. </p>
<div class="refsect2">
<a name="idm20705"></a><h3>
<a name="boost.histogram.accumulators.sumconstruct-copy-destruct"></a><code class="computeroutput">sum</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"><a name="idm13303-bb"></a><span class="identifier">sum</span><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><a name="idm13304-bb"></a><span class="identifier">sum</span><span class="special">(</span><span class="identifier">const_reference</span> value<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Initialize sum to value and allow implicit conversion. </li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a name="idm13308-bb"></a><span class="identifier">sum</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> s<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Allow implicit conversion from sum&lt;T&gt; </li>
<li class="listitem">
<pre class="literallayout"><a name="idm13315-bb"></a><span class="identifier">sum</span><span class="special">(</span><span class="identifier">const_reference</span> large_part<span class="special">,</span> <span class="identifier">const_reference</span> small_part<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Initialize sum explicitly with large and small parts. </li>
</ol></div>
</div>
<div class="refsect2">
<a name="idm20761"></a><h3>
<a name="idm13200-bb"></a><code class="computeroutput">sum</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a name="idm13201-bb"></a><span class="keyword">operator</span><span class="special">++</span><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Increment sum by one. </li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a name="idm13205-bb"></a><span class="keyword">operator</span><span class="special">+=</span><span class="special">(</span><span class="identifier">const_reference</span> value<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Increment sum by value. </li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a name="idm13211-bb"></a><span class="keyword">operator</span><span class="special">+=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> s<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Add another sum. </li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a name="idm13218-bb"></a><span class="keyword">operator</span> <span class="special">*=</span><span class="special">(</span><span class="identifier">const_reference</span> value<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Scale by value. </li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm13224-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm13229-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">value_type</span> <a name="idm13234-bb"></a><span class="identifier">value</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Return value of the sum. </li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">const_reference</span> <a name="idm13237-bb"></a><span class="identifier">large_part</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Return large part of the sum. </li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">const_reference</span> <a name="idm13240-bb"></a><span class="identifier">small_part</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Return small part of the sum. </li>
<li class="listitem"><pre class="literallayout"><span class="keyword">explicit</span> <a name="idm13243-bb"></a><span class="keyword">operator</span> <span class="identifier">value_type</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Archive<span class="special">&gt;</span> <span class="keyword">void</span> <a name="idm13245-bb"></a><span class="identifier">serialize</span><span class="special">(</span><span class="identifier">Archive</span> <span class="special">&amp;</span> ar<span class="special">,</span> <span class="keyword">unsigned</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a name="idm13253-bb"></a><span class="keyword">operator</span> <span class="special">*=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <a name="idm13259-bb"></a><span class="keyword">operator</span> <span class="special">*</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> <a name="idm13265-bb"></a><span class="keyword">operator</span><span class="special">/=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><a class="link" href="sum.html" title="Class template sum">sum</a> <a name="idm13271-bb"></a><span class="keyword">operator</span><span class="special">/</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm13277-bb"></a><span class="keyword">operator</span><span class="special">&lt;</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm13282-bb"></a><span class="keyword">operator</span><span class="special">&gt;</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm13287-bb"></a><span class="keyword">operator</span><span class="special">&lt;=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm13292-bb"></a><span class="keyword">operator</span><span class="special">&gt;=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="sum.html" title="Class template sum">sum</a> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">const_reference</span> <a name="idm13297-bb"></a><span class="identifier">large</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Return large part of the sum. </li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">const_reference</span> <a name="idm13300-bb"></a><span class="identifier">small</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Return small part of the sum. </li>
</ol></div>
</div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Hans
      Dembinski<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
      </p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="mean.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../histogram/reference.html#header.boost.histogram.accumulators.sum_hpp"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="is_thread_safe_th_idm13325.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>
